Our personal data is worth money to others. They don't want their money taken from them.

No, no, you misunderstand. In reality Facebook is selflessly fighting for our rights to remember. They would allow you to delete the data, but they are concerned about freedom of expression being preserved. They said it right here:

Facebook in particular has strong objections to the right to be forgotten, claiming it "raises many concerns with regard to the right of others to remember and to freedom of expression"